# CVE-2026-47741: Shopper shopper/cart race condition in discount usage limits

Source: https://junglewise.ai/threats/cve-2026-47741-shopper-shopper-cart-race-condition-in-discount-usage-limits  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-29. Updated: 2026-05-29  
License: CC BY 4.0 with a link back

CVE-2026-47741 · Severity: medium · CVSS 5.9 · Published 2026-05-29

Shopper is a headless e-commerce admin panel. A flaw in how the system processes discounts during checkout allows customers to bypass usage limits during high-traffic events like Black Friday or flash sales. This can lead to direct financial loss for merchants as more discounts are applied than intended, with no immediate notification that the limits were exceeded.

Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist), [Shopper Labs](https://junglewise.ai/threats/vendors/shopper-labs).

## Quick answers

**Is CVE-2026-47741 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47741 being exploited in the wild.

**How severe is CVE-2026-47741?** Medium severity, with a CVSS score of 5.9, published 29 May 2026.

**Which products and versions are affected?** shopper/cart (Packagist) ECOSYSTEM:introduced=0,fixed=2.8.0; Shopper Labs Cart < 2.8.0.

**Is there a fix for CVE-2026-47741?** Yes. shopper/cart (Packagist): upgrade to 2.8.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-47741 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47741?** Check whether you run shopper/cart (Packagist) or Shopper Labs Cart at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- shopper/cart (Packagist): upgrade to 2.8.0 or later

  ```sh
  composer require shopper/cart:^2.8.0
  ```


## Technical details

A race condition exists in the `CreateOrderFromCartAction::execute` method because it creates an `Order` record before checking and incrementing the discount's `total_use` counter. Under concurrent load, multiple requests can pass the initial validation and commit orders with discounts applied even after the global `usage_limit` has been reached, as the subsequent increment operation's failure is not checked. Additionally, the `usage_limit_per_user` check was non-functional because it relied on a counter that was never incremented. The vulnerability is fixed in version 2.8.0 by implementing atomic reservation with row-level locking and a compare-and-swap pattern within the database transaction.

## Affected products

- Shopper Labs shopper/cart < 2.8.0

## Identifiers

- CVE-2026-47741
- GHSA-9rh9-hf3w-9fgg

## Timeline

- 2026-05-11: patched: Fixed in version 2.8.0
- 2026-05-11: advisory: GitHub Security Advisory published
- 2026-05-29: disclosed: CVE-2026-47741 published to NVD

## References

- [https://github.com/shopperlabs/shopper/issues/510](https://github.com/shopperlabs/shopper/issues/510)
- [https://github.com/shopperlabs/shopper/pull/511](https://github.com/shopperlabs/shopper/pull/511)
- [https://github.com/shopperlabs/shopper/security/advisories/GHSA-9rh9-hf3w-9fgg](https://github.com/shopperlabs/shopper/security/advisories/GHSA-9rh9-hf3w-9fgg)